Johann Friedrich Fasch (1688–1758) was a German composer and conductor, primarily associated with the Baroque and early Classical periods. He is known for his contributions to orchestral music and his innovative use of instrumentation. Fasch's work often exemplified the transition from the Baroque style to the emerging Classical idioms. Fasch's notable works include a series of orchestral suites and concertos, comprising over 50 orchestral compositions, many of which showcase his mastery of orchestration. His "Sinfonia in D major" and various instrumental concertos, especially for oboe and flute, demonstrate his skill in blending melodic lines and textures. Additionally, his sacred music, including cantatas and oratorios, further contributed to his reputation. Fasch's impact on music is significant as he influenced the development of the symphonic form and orchestration techniques. His compositions were admired by contemporaries, including J.S. Bach and Carl Philipp Emanuel Bach, and he played a key role in the musical life of his time, serving as a conductor and music director in various courts. Although not as widely known today, his work laid important groundwork for the evolution of orchestral music in the 18th century.